Btrfs: Add a missing return pointer check

Add a missing kzalloc() return pointer check in add_missing_dev().

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index d6f1996..ecf0633 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2755,6 +2755,8 @@ static struct btrfs_device *add_missing_dev(struct btrfs_root *root,
        struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
 
        device = kzalloc(sizeof(*device), GFP_NOFS);
+       if (!device)
+               return NULL;
        list_add(&device->dev_list,
                 &fs_devices->devices);
        device->barriers = 1;